Hello,

the preloader is defined in header.php  as follows (lines 16-25):

<!-- Preloader -->
        <div class="preloader-wrap">
            <div class="outer">
<div class="inner">
                    <div class="percentage" id="precent"></div>
                    <div class="trackbar">
                        <div class="loadbar"></div>
                    </div>
                </div>
            </div>
        </div>
        <!--/Preloader -->

And the code for the animation is in /js/scripts.js

function PageLoad() on line 32 - animation and fading out